Trace Sciences International

Lanthanum Isotopes

Nominal Mass
Accurate Mass
% Natural Abundance
Chemical Form
Enrichment Available %

138 La

137.907105 (6)

0.09 (1)

Oxide

6 – 11+

139 La

138.906347 (5)

99.91 (1)

Oxide

99+

Lanthanum Isotopes are used in the medical isotope industry. La-139 is used for the production of the medical radioisotope Ce-139.